Installing and Administering Internet Services

356 Chapter8
Configuring gated
Configuring the OSPF Protocol
Figure 8-10 Backbone Configuration Example
The following is an example of the backbone router definition for router
A’s /etc/gated.conf file:
backbone {
interface 15.13.115.156 {
enable ;
transitdelay 20 ;
priority 20 ;
hellointerval 30 ;
routerdeadinterval 120 ;
retransmitinterval 60 ;
} ;
} ;
If the router is directly attached via a point-to-point interface to a host
that is not running OSPF, you can prevent OSPF Hello packets from
being sent to the host. This is done by specifying the subhost statement
with the host’s address. A cost can optionally be defined.
NOTE Backbones must be directly-connected or “contiguous”. In some gated
Router A Router B
Area 0.0.0.1
Area 0.0.0.2 Area 0.0.0.4
Area 0.0.0.3
15.13.115.156